DE69014404D1 - Biodegradable polyurethanes. - Google Patents
Biodegradable polyurethanes.Info
- Publication number
- DE69014404D1 DE69014404D1 DE69014404T DE69014404T DE69014404D1 DE 69014404 D1 DE69014404 D1 DE 69014404D1 DE 69014404 T DE69014404 T DE 69014404T DE 69014404 T DE69014404 T DE 69014404T DE 69014404 D1 DE69014404 D1 DE 69014404D1
- Authority
- DE
- Germany
- Prior art keywords
- aza
- imino
- segments
- oxygen
- residue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5005—Wall or coating material
- A61K9/5021—Organic macromolecular compounds
- A61K9/5031—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poly(lactide-co-glycolide)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/4891—Coated capsules; Multilayered drug free capsule shells
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5073—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals having two or more different coatings optionally including drug-containing subcoatings
- A61K9/5078—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals having two or more different coatings optionally including drug-containing subcoatings with drug-free core
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
- C08G18/3836—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing azo groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2230/00—Compositions for preparing biodegradable polymers
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Medicinal Chemistry (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Medicinal Preparation (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
A polyurethane (I) of 1000 to 100000 in molecular weight, comprising plural segments, which are each structural units of A-B, A-C and A-D of the formulae: A-B: - @NH-R<1>-NH-@-aza- A-C: - @NH-R<1>-NH-@-Z-R<2>-Z- and A-D: - @NH-R<1>-NH@-O-R<3>-O- the molar proportion of the said segments of A-B, A-C and A-D i.e. x : y : z being 0.01 to 0.8 : 0 to 0.80 : 0 to 0.99, provided that the sum of x, y and z is 1.0; wherein R<1> is a skeleton of a diisocyanate, aza is a group of the formula: <CHEM> wherein Y<1> and Y<2>, represent oxygen, imino (-NH-) and hydrocarbon derivatives thereof; R<4> and R<5> are optional substituents; R<2> is a polyalkylene glycol residue; Z is oxygen or imino; R<3> is alkylene or the residue of an ether or secondary or tertiary amine. The polurethanes are useful for coating medicaments for release in the large intestine.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6513689 | 1989-03-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69014404D1 true DE69014404D1 (en) | 1995-01-12 |
DE69014404T2 DE69014404T2 (en) | 1995-05-18 |
Family
ID=13278168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69014404T Expired - Fee Related DE69014404T2 (en) | 1989-03-17 | 1990-03-16 | Biodegradable polyurethanes. |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0398472B1 (en) |
JP (1) | JP2855463B2 (en) |
KR (1) | KR0158206B1 (en) |
AT (1) | ATE114681T1 (en) |
CA (1) | CA2012469C (en) |
DE (1) | DE69014404T2 (en) |
DK (1) | DK0398472T3 (en) |
ES (1) | ES2072976T3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5194463B1 (en) * | 1991-09-27 | 1995-06-20 | Eastman Kodak Co | Light-absorbing polyurethane compositions and thermoplastic polymers colored therewith |
DE69229710T2 (en) * | 1991-11-15 | 2000-03-02 | Kanegafuchi Chemical Ind | Polymers containing ester linkage for pharmaceutical preparations |
US5886091A (en) * | 1996-01-05 | 1999-03-23 | Milliken & Company | Printing ink composition |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3909497A (en) * | 1974-04-12 | 1975-09-30 | Stanford Research Inst | Solid polymers thermally degradable to flowable compositions |
US4235988A (en) * | 1976-12-13 | 1980-11-25 | Imperial Chemical Industries Limited | Delivery means for biologically active agents |
AU537741B2 (en) * | 1979-03-21 | 1984-07-12 | British Technology Group Limited | Controlled release compositions |
DE3242559A1 (en) * | 1982-11-18 | 1984-05-24 | Basf Ag, 6700 Ludwigshafen | METHOD FOR THE PRODUCTION OF CELL-MADE POLYURETHANE-POLYHANE MOLDED BODIES, WHEREAS POSSIBLE |
US4663308A (en) * | 1984-07-18 | 1987-05-05 | Medical College Of Ohio | Method of use of polymers containing cross-linked azo bonds for releasing therapeutic agents into the lower gastrointestinal tract |
-
1990
- 1990-03-16 DK DK90302867.8T patent/DK0398472T3/en active
- 1990-03-16 JP JP2064028A patent/JP2855463B2/en not_active Expired - Fee Related
- 1990-03-16 ES ES90302867T patent/ES2072976T3/en not_active Expired - Lifetime
- 1990-03-16 DE DE69014404T patent/DE69014404T2/en not_active Expired - Fee Related
- 1990-03-16 EP EP90302867A patent/EP0398472B1/en not_active Expired - Lifetime
- 1990-03-16 AT AT90302867T patent/ATE114681T1/en not_active IP Right Cessation
- 1990-03-17 KR KR1019900003581A patent/KR0158206B1/en not_active IP Right Cessation
- 1990-03-19 CA CA002012469A patent/CA2012469C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DK0398472T3 (en) | 1995-01-16 |
EP0398472B1 (en) | 1994-11-30 |
JPH037718A (en) | 1991-01-14 |
CA2012469C (en) | 1998-05-12 |
EP0398472A3 (en) | 1991-09-18 |
JP2855463B2 (en) | 1999-02-10 |
DE69014404T2 (en) | 1995-05-18 |
ES2072976T3 (en) | 1995-08-01 |
CA2012469A1 (en) | 1990-09-17 |
ATE114681T1 (en) | 1994-12-15 |
KR900014451A (en) | 1990-10-24 |
EP0398472A2 (en) | 1990-11-22 |
KR0158206B1 (en) | 1999-02-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |